Profilograph



Jan. 19 1926.

p. BERGE PROFILOGRAPH Filed April 18, 1924 zontal edge of the recording sheet.

Patented Jan. 19, 1926.

UNITE-D STATE-s PATENT ome DAV 1D BERGE, OF TBONDLIJEM, NORfi/VAY.

PROFILOGRAIPH.

Application fi1ed' April 13, 1924-. Serial No. 707,504.

To all whoma't may concern:

Be it known that I, DAVID Bnnsn, a subjest of the King of Norway, residing at Brinken 10, Trondhjem, Norway, have invented certain new. and useful Improvements in Profilographs and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as degrees of accuracy; To this end I employ a measuring compass and a recording board on. which the result of the measuring is directly printed. p

In the following the invention will be explained with reference to the accompanying drawings, in which 1 is a diagrammatical side view of a measuring compass in accordancewith my invention, together with the recording board cooperating therewith. I 1

Fig. 2 is a corresponding end view. Fig. 3 is a sectional view of thehead piece of the compass and Fig. 4 is aside view of the same.

Fig. 5 isa side view of the said head with its points in positions corresponding to that of 1 and 2. I

Fig. 6 is a diagram illustrating the best way of profilating the broken ground shown therein.

Referring to the drawings (Figs. 1 and 2), A and'B are the foot points in the ground of the legs 1 and 2 of the profilating compass. The leg 1 preferably is made in two parts and is provided with a detachable sleeve. 3 is a marking or recording board, provided along its upper edge with a rail 4 carrying a spirit or other level, and serving as abutment for the upper hori- The board 3 is carried by aid of a handle 5 (Fig. 2), a metal plate 6 serving as a bearer for the recording sheet. A and B. are sharp points adapted to be pressed against the recording sheet onthe recording board inv Further order to mark thereon the corresponding points The marking point A is fastened to a block or head 7. which by aid of a clamping screw 0 is fastened to the hinge bolt 8. said bolt being firmly connected to the l'eg 2 of the compass. The other marking point Bfis fastened to the leg 1. A shoulder 11. on the hinge bolt 8 keeps the legs 1 and 2 together. The end of the hinge bolt 8 is supported by an annular journal '12, fastened to the head of the leg 1 by aid of three clamping screws 13. The points AB as shown in the drawings are arranged parallel to the hinge bolt 8 of the compass legs 1 and '2. C is the central point of the hinge bolt. The profilating; compass works on the principle of a reduction compass, the proportions of the legs being:

If for instance the profiles are to bereduced' to a scale of 1 :200', the above proportion of K ot may suitably be made 0.8 .cm. 160 cm.

A B 1 AB 7c wherefrom is deducted that when the lower ends of the legs are placed on the points A and B, respectively in the ground, the distance between the points A B will be 1/200 of this distance AB, and theangle of slope of the line A B will be equal to that of the line AB.

From this will be understood that when the point A is pressed against a corresponding point on the marking sheet of the recording board 3, and this board is then turned about the point A until thespirit level fastened to this board is in its level position, and the point B in this position of the board is pressed against the marking paper sheet, the point B of the ground is thereby correctly marked off on the recording sheet.

When continuing the profilating operation the points B and B are used inthe same manner .as A and A, whereby a third point is marked on the recording sheet, and so on.

For the handling of this apparatus only one person is needed. He carries the re cording board in one hand, and the compass in the other.

If the apparatus is to work with a perma nent length of steps (i. e. with a permanent distance between the lower ends of the legs) it may be simplified, the hinge bolt 8 being then superfluous, and it being then suliicient to fasten the two point AB permanently, for instance on one of the legs, in a suitable length. above the ground and on a line paral lel with that through the lower ends of the legs 1 and 2.

In the executional form of the apparatus illustrated in the drawings the two legs of the compass are of ditl'erent length for instance 3 and 1.5 meters. These lengths may be varied at will, provided that they conform with the equations given in the foregoing. If, however, the legs are made of equal lengths the points AB are liable to collide, when the legs are to be swung past one another. The use oi one long leg also facilitates reaching comparatively inaccessible points in the ground.

When the apparatus is to be used it is placed as illustrated in Fig. 1, and the points AB are pressed against the recording paper sheet on the marking boardor vice versathereby marking the points AB on the paper. The operation is then continued by alternately swinging the legs of the compass. The points marked oil on the latter are eventually united by a linethe profile line.

The ground profile shown in Fig. 6 illustrates the way in which it may be recorded by aid of the apparatus. The points A B having been marked on the recording sheet, the long le 1 is swung successively to the points C, D and E, the corresponding points being recorded on the recording sheet.

Clain1s 1. A profilating apparatus including a two-legged compass, the lower ends of said legs forming points adapted to be placed in contact with the ground, two marking points on the compass arranged on a line parallel to a line drawn through the points of the legs, and a recording board adapted to carry a record sheet and provided with leveling means to permit the operator to maintain the board in a predetermined position while pressing the board against said marking points.

2. A prolilating apparatus including a compass provided with two pivotally connected legs, the lower ends of said legs being adapted to contact with the ground, a mark ing point for each leg fixed to move with the leg with which it is associated, said marki points being spaced from each other and being parallel to the axis of the pivot connecting the legs, and a recording board for the marking point-s adapted to support a record sheet and provided with a spirit level to permit said sheet to be brought in proper position relatively to the horizontal.

3. A profilating apparatus including a compass having two legs, a pivot pin fixed toone of said legs, the other leg being free to swing about the pivot pin, a clamping member fixed to the pivot pin, a marking point carried by the clamping member, a sleeve forming part of the leg which swings about the pivot pin, a bearing for the pivot pin, adjustable members connected to the sleeve and engaging said bearing, and a second marking point carried by said sleeve,

said marking points being spaced from each other and from the axis of said pivot pin, and being arranged parallel to said axis.

In testimony that I claim the foregoing as my invention, I have signed my name. DAVID BERGEL 

